来回通信延迟(RTT)
来回通信延迟(RTT) 是指数据包从发送到目的地再到返回到源站所需的总时间。可以使用 ping
命令来确定网络和服务器之间的 RTT。
bash
ping example.com
这将输出类似以下内容:
PING example.com (216.58.194.174): 56 data bytes 64 bytes from 216.58.194.174: icmp_seq=0 ttl=55 time=25.050 ms 64 bytes from 216.58.194.174: icmp_seq=1 ttl=55 time=23.781 ms 64 bytes from 216.58.194.174: icmp_seq=2 ttl=55 time=24.287 ms 64 bytes from 216.58.194.174: icmp_seq=3 ttl=55 time=34.904 ms 64 bytes from 216.58.194.174: icmp_seq=4 ttl=55 time=26.119 ms --- google.com ping statistics --- 5 packets transmitted, 5 packets received, 0.0% packet loss round-trip min/avg/max/stddev = 23.781/26.828/34.904/4.114 ms
在上述示例中,平均来回通信延迟显示在最后一行,为 26.8 毫秒。